/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#ifndef UV_UNIX_H
#define UV_UNIX_H

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h> /* MAXHOSTNAMELEN on Solaris */

#include <termios.h>
#include <pwd.h>

#if !defined(__MVS__)
#include <semaphore.h>
#include <sys/param.h> /* MAXHOSTNAMELEN on Linux and the BSDs */
#endif
#include <pthread.h>
#include <signal.h>

#include "uv/threadpool.h"

#if defined(__linux__)
#include "uv/linux.h"
#elif defined(__MVS__)
#include "uv/os390.h"
#elif defined(__PASE__) /* __PASE__ and _AIX are both defined on IBM i */
#include "uv/posix.h" /* IBM i needs uv/posix.h, not uv/aix.h */
#elif defined(_AIX)
#include "uv/aix.h"
#elif defined(__sun)
#include "uv/sunos.h"
#elif defined(__APPLE__)
#include "uv/darwin.h"
#elif defined(__DragonFly__) || \
    defined(__FreeBSD__) || \
    defined(__FreeBSD_kernel__) || \
    defined(__OpenBSD__) || \
    defined(__NetBSD__)
#include "uv/bsd.h"
#elif defined(__CYGWIN__) || \
    defined(__MSYS__) || \
    defined(__GNU__)
#include "uv/posix.h"
#elif defined(__HAIKU__)
#include "uv/posix.h"
#endif

#ifndef NI_MAXHOST
#define NI_MAXHOST 1025
#endif

#ifndef NI_MAXSERV
#define NI_MAXSERV 32
#endif

#ifndef UV_IO_PRIVATE_PLATFORM_FIELDS
#define UV_IO_PRIVATE_PLATFORM_FIELDS /* empty */
#endif

struct uv__io_s;
struct uv_loop_s;

typedef void (*uv__io_cb)(struct uv_loop_s* loop,
                          struct uv__io_s* w,
                          unsigned int events);
typedef struct uv__io_s uv__io_t;

struct uv__io_s {
  uv__io_cb cb;
  void* pending_queue[2];
  void* watcher_queue[2];
  unsigned int pevents; /* Pending event mask i.e. mask at next tick. */
  unsigned int events; /* Current event mask. */
  int fd;
  UV_IO_PRIVATE_PLATFORM_FIELDS
};

#ifndef UV_PLATFORM_SEM_T
#define UV_PLATFORM_SEM_T sem_t
#endif

#ifndef UV_PLATFORM_LOOP_FIELDS
#define UV_PLATFORM_LOOP_FIELDS /* empty */
#endif

#ifndef UV_PLATFORM_FS_EVENT_FIELDS
#define UV_PLATFORM_FS_EVENT_FIELDS /* empty */
#endif

#ifndef UV_STREAM_PRIVATE_PLATFORM_FIELDS
#define UV_STREAM_PRIVATE_PLATFORM_FIELDS /* empty */
#endif

/* Note: May be cast to struct iovec. See writev(2). */
typedef struct uv_buf_t {
  char* base;
  size_t len;
} uv_buf_t;

typedef int uv_file;
typedef int uv_os_sock_t;
typedef int uv_os_fd_t;
typedef pid_t uv_pid_t;

#define UV_ONCE_INIT PTHREAD_ONCE_INIT

typedef pthread_once_t uv_once_t;
typedef pthread_t uv_thread_t;
typedef pthread_mutex_t uv_mutex_t;
typedef pthread_rwlock_t uv_rwlock_t;
typedef UV_PLATFORM_SEM_T uv_sem_t;
typedef pthread_cond_t uv_cond_t;
typedef pthread_key_t uv_key_t;

/* Note: guard clauses should match uv_barrier_init's in src/unix/thread.c. */
#if defined(_AIX) || \
    defined(__OpenBSD__) || \
    !defined(PTHREAD_BARRIER_SERIAL_THREAD)
/* TODO(bnoordhuis) Merge into uv_barrier_t in v2. */
struct _uv_barrier {
  uv_mutex_t mutex;
  uv_cond_t cond;
  unsigned threshold;
  unsigned in;
  unsigned out;
};

typedef struct {
  struct _uv_barrier* b;
#if defined(PTHREAD_BARRIER_SERIAL_THREAD)
  /* TODO(bnoordhuis) Remove padding in v2. */
  char pad[sizeof(pthread_barrier_t) - sizeof(struct _uv_barrier*)];
#endif
} uv_barrier_t;
#else
typedef pthread_barrier_t uv_barrier_t;
#endif

/* Platform-specific definitions for uv_spawn support. */
typedef gid_t uv_gid_t;
typedef uid_t uv_uid_t;

typedef struct dirent uv__dirent_t;

#define UV_DIR_PRIVATE_FIELDS \
  DIR* dir;

#if defined(DT_UNKNOWN)
#define HAVE_DIRENT_TYPES
#if defined(DT_REG)
#define UV__DT_FILE DT_REG
#else
#define UV__DT_FILE -1
#endif
#if defined(DT_DIR)
#define UV__DT_DIR DT_DIR
#else
#define UV__DT_DIR -2
#endif
#if defined(DT_LNK)
#define UV__DT_LINK DT_LNK
#else
#define UV__DT_LINK -3
#endif
#if defined(DT_FIFO)
#define UV__DT_FIFO DT_FIFO
#else
#define UV__DT_FIFO -4
#endif
#if defined(DT_SOCK)
#define UV__DT_SOCKET DT_SOCK
#else
#define UV__DT_SOCKET -5
#endif
#if defined(DT_CHR)
#define UV__DT_CHAR DT_CHR
#else
#define UV__DT_CHAR -6
#endif
#if defined(DT_BLK)
#define UV__DT_BLOCK DT_BLK
#else
#define UV__DT_BLOCK -7
#endif
#endif

/* Platform-specific definitions for uv_dlopen support. */
#define UV_DYNAMIC /* empty */

typedef struct {
  void* handle;
  char* errmsg;
} uv_lib_t;

#define UV_LOOP_PRIVATE_FIELDS \
  unsigned long flags; \
  int backend_fd; \
  void* pending_queue[2]; \
  void* watcher_queue[2]; \
  uv__io_t** watchers; \
  unsigned int nwatchers; \
  unsigned int nfds; \
  void* wq[2]; \
  uv_mutex_t wq_mutex; \
  uv_async_t wq_async; \
  uv_rwlock_t cloexec_lock; \
  uv_handle_t* closing_handles; \
  void* process_handles[2]; \
  void* prepare_handles[2]; \
  void* check_handles[2]; \
  void* idle_handles[2]; \
  void* async_handles[2]; \
  void (*async_unused)(void); /* TODO(bnoordhuis) Remove in libuv v2. */ \
  uv__io_t async_io_watcher; \
  int async_wfd; \
  struct { \
    void* min; \
    unsigned int nelts; \
  } timer_heap; \
  uint64_t timer_counter; \
  uint64_t time; \
  int signal_pipefd[2]; \
  uv__io_t signal_io_watcher; \
  uv_signal_t child_watcher; \
  int emfile_fd; \
  UV_PLATFORM_LOOP_FIELDS

#define UV_REQ_TYPE_PRIVATE /* empty */

#define UV_REQ_PRIVATE_FIELDS /* empty */

#define UV_PRIVATE_REQ_TYPES /* empty */

#define UV_WRITE_PRIVATE_FIELDS \
  void* queue[2]; \
  unsigned int write_index; \
  uv_buf_t* bufs; \
  unsigned int nbufs; \
  int error; \
  uv_buf_t bufsml[4];

#define UV_CONNECT_PRIVATE_FIELDS \
  void* queue[2];

#define UV_SHUTDOWN_PRIVATE_FIELDS /* empty */

#define UV_UDP_SEND_PRIVATE_FIELDS \
  void* queue[2]; \
  struct sockaddr_storage addr; \
  unsigned int nbufs; \
  uv_buf_t* bufs; \
  ssize_t status; \
  uv_udp_send_cb send_cb; \
  uv_buf_t bufsml[4];

#define UV_HANDLE_PRIVATE_FIELDS \
  uv_handle_t* next_closing; \
  unsigned int flags;

#define UV_STREAM_PRIVATE_FIELDS \
  uv_connect_t* connect_req; \
  uv_shutdown_t* shutdown_req; \
  uv__io_t io_watcher; \
  void* write_queue[2]; \
  void* write_completed_queue[2]; \
  uv_connection_cb connection_cb; \
  int delayed_error; \
  int accepted_fd; \
  void* queued_fds; \
  UV_STREAM_PRIVATE_PLATFORM_FIELDS

#define UV_TCP_PRIVATE_FIELDS /* empty */

#define UV_UDP_PRIVATE_FIELDS \
  uv_alloc_cb alloc_cb; \
  uv_udp_recv_cb recv_cb; \
  uv__io_t io_watcher; \
  void* write_queue[2]; \
  void* write_completed_queue[2];

#define UV_PIPE_PRIVATE_FIELDS \
  const char* pipe_fname; /* strdup'ed */

#define UV_POLL_PRIVATE_FIELDS \
  uv__io_t io_watcher;

#define UV_PREPARE_PRIVATE_FIELDS \
  uv_prepare_cb prepare_cb; \
  void* queue[2];

#define UV_CHECK_PRIVATE_FIELDS \
  uv_check_cb check_cb; \
  void* queue[2];

#define UV_IDLE_PRIVATE_FIELDS \
  uv_idle_cb idle_cb; \
  void* queue[2];

#define UV_ASYNC_PRIVATE_FIELDS \
  uv_async_cb async_cb; \
  void* queue[2]; \
  int pending;

#define UV_TIMER_PRIVATE_FIELDS \
  uv_timer_cb timer_cb; \
  void* heap_node[3]; \
  uint64_t timeout; \
  uint64_t repeat; \
  uint64_t start_id;

#define UV_GETADDRINFO_PRIVATE_FIELDS \
  struct uv__work work_req; \
  uv_getaddrinfo_cb cb; \
  struct addrinfo* hints; \
  char* hostname; \
  char* service; \
  struct addrinfo* addrinfo; \
  int retcode;

#define UV_GETNAMEINFO_PRIVATE_FIELDS \
  struct uv__work work_req; \
  uv_getnameinfo_cb getnameinfo_cb; \
  struct sockaddr_storage storage; \
  int flags; \
  char host[NI_MAXHOST]; \
  char service[NI_MAXSERV]; \
  int retcode;

#define UV_PROCESS_PRIVATE_FIELDS \
  void* queue[2]; \
  int status;

#define UV_FS_PRIVATE_FIELDS \
  const char* new_path; \
  uv_file file; \
  int flags; \
  mode_t mode; \
  unsigned int nbufs; \
  uv_buf_t* bufs; \
  off_t off; \
  uv_uid_t uid; \
  uv_gid_t gid; \
  double atime; \
  double mtime; \
  struct uv__work work_req; \
  uv_buf_t bufsml[4];

#define UV_WORK_PRIVATE_FIELDS \
  struct uv__work work_req;

#define UV_TTY_PRIVATE_FIELDS \
  struct termios orig_termios; \
  int mode;

#define UV_SIGNAL_PRIVATE_FIELDS \
  /* RB_ENTRY(uv_signal_s) tree_entry; */ \
  struct { \
    struct uv_signal_s* rbe_left; \
    struct uv_signal_s* rbe_right; \
    struct uv_signal_s* rbe_parent; \
    int rbe_color; \
  } tree_entry; \
  /* Use two counters here so we don have to fiddle with atomics. */ \
  unsigned int caught_signals; \
  unsigned int dispatched_signals;

#define UV_FS_EVENT_PRIVATE_FIELDS \
  uv_fs_event_cb cb; \
  UV_PLATFORM_FS_EVENT_FIELDS

/* fs open() flags supported on this platform: */
#if defined(O_APPEND)
#define UV_FS_O_APPEND O_APPEND
#else
#define UV_FS_O_APPEND 0
#endif
#if defined(O_CREAT)
#define UV_FS_O_CREAT O_CREAT
#else
#define UV_FS_O_CREAT 0
#endif
#if defined(O_DIRECT)
#define UV_FS_O_DIRECT O_DIRECT
#else
#define UV_FS_O_DIRECT 0
#endif
#if defined(O_DIRECTORY)
#define UV_FS_O_DIRECTORY O_DIRECTORY
#else
#define UV_FS_O_DIRECTORY 0
#endif
#if defined(O_DSYNC)
#define UV_FS_O_DSYNC O_DSYNC
#else
#define UV_FS_O_DSYNC 0
#endif
#if defined(O_EXCL)
#define UV_FS_O_EXCL O_EXCL
#else
#define UV_FS_O_EXCL 0
#endif
#if defined(O_EXLOCK)
#define UV_FS_O_EXLOCK O_EXLOCK
#else
#define UV_FS_O_EXLOCK 0
#endif
#if defined(O_NOATIME)
#define UV_FS_O_NOATIME O_NOATIME
#else
#define UV_FS_O_NOATIME 0
#endif
#if defined(O_NOCTTY)
#define UV_FS_O_NOCTTY O_NOCTTY
#else
#define UV_FS_O_NOCTTY 0
#endif
#if defined(O_NOFOLLOW)
#define UV_FS_O_NOFOLLOW O_NOFOLLOW
#else
#define UV_FS_O_NOFOLLOW 0
#endif
#if defined(O_NONBLOCK)
#define UV_FS_O_NONBLOCK O_NONBLOCK
#else
#define UV_FS_O_NONBLOCK 0
#endif
#if defined(O_RDONLY)
#define UV_FS_O_RDONLY O_RDONLY
#else
#define UV_FS_O_RDONLY 0
#endif
#if defined(O_RDWR)
#define UV_FS_O_RDWR O_RDWR
#else
#define UV_FS_O_RDWR 0
#endif
#if defined(O_SYMLINK)
#define UV_FS_O_SYMLINK O_SYMLINK
#else
#define UV_FS_O_SYMLINK 0
#endif
#if defined(O_SYNC)
#define UV_FS_O_SYNC O_SYNC
#else
#define UV_FS_O_SYNC 0
#endif
#if defined(O_TRUNC)
#define UV_FS_O_TRUNC O_TRUNC
#else
#define UV_FS_O_TRUNC 0
#endif
#if defined(O_WRONLY)
#define UV_FS_O_WRONLY O_WRONLY
#else
#define UV_FS_O_WRONLY 0
#endif

/* fs open() flags supported on other platforms: */
#define UV_FS_O_FILEMAP 0
#define UV_FS_O_RANDOM 0
#define UV_FS_O_SHORT_LIVED 0
#define UV_FS_O_SEQUENTIAL 0
#define UV_FS_O_TEMPORARY 0

#endif /* UV_UNIX_H */
